Process for preparing Pd nano-particle film on surface of gold electrode

A technology of nanoparticles and gold electrodes, which is applied in the field of preparation of noble metal palladium nanoparticle films on the surface of gold electrodes, can solve the problems of insufficient sensitivity of monitoring and insufficient stability of response signals, and achieve high sensitivity, good stability, and simple preparation methods Effect

Inactive Publication Date: 2005-01-19
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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AI Technical Summary

Problems solved by technology

There are long-term problems that the response signal is not stable enough and the monitoring is not sensitive enough

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Embodiment 1: the gold electrode (this electrode is in 1M H 2 SO 4 The standard voltammogram can be obtained by scanning in the solution) immersed in the solution containing 0.01mM K 2 PdCl 4 +1M H 2 SO 4 In the aqueous solution, and constantly stirring the electrolyte, the cathode was polarized at the potential of -0.1V for 40 minutes, the electrode was taken out, rinsed with water, and after being placed in a desiccator for one day, the modified electrode deposited with metal palladium nanoparticles was obtained.

Embodiment 2

[0014] Embodiment 2: Gold electrode condition is the same as embodiment 1, and this gold electrode is immersed in containing 0.05mMK 2 PdCl 4 +1M H 2 SO 4 In the aqueous solution, and constantly stirring the electrolyte, the cathode was polarized at the potential of -0.8V for 10 minutes, and the electrode treatment was the same as in Example 1, that is, a modified electrode deposited with metal palladium nanoparticles was obtained.

Embodiment 3

[0015] Embodiment 3: Gold electrode condition is the same as embodiment 1, and this gold electrode is immersed in containing 0.5mMK 2 PdCl 4 +0.6M H 2 SO 4 In the aqueous solution, and constantly stirring the electrolyte, the cathode was polarized at the potential of -0.4V for 30 minutes, and the electrode treatment was the same as in Example 1, that is, a modified electrode deposited with metal palladium nanoparticles was obtained.

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Abstract

A process for preparing Pd nanoparticle film on the surface of gold electrode used to monitor oxygen in environment is characterized by use of gold electrode as modified substrate, Pd sheet as counter-electrode and Ag / AgCl as reference electrode, and includes such steps as immersing the gold electrode in sulfuric acid solution contaiing potassium chloropalladate, stirring electrolyte, polarizing for 10-40 min, washing electrode with water, and drying. The DO sensor made of it has high stability and sensitivity.

Description

technical field [0001] The invention relates to a preparation method of an electrode, in particular to a preparation method of modifying a noble metal palladium nanoparticle film on the surface of a gold electrode. Background technique [0002] The determination of dissolved oxygen (DO) concentration is very important in many fields such as industry, medicine and environment. The level of DO in water is an important indicator of water quality. Strict control of DO is very important in both sewage treatment and fermentation processes. Modern industry, environmental quality and clinical monitoring increasingly require real-time on-site or online analysis. In particular, higher requirements are put forward for monitoring instruments, which are not only reliable in performance, but also develop in the direction of automatic, online, small and portable. The development of an online dissolved oxygen sensor suitable for process analysis will be one of the important tasks. [00...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D3/50C25D5/00G01N27/30G01N27/409
Inventor 董绍俊申燕刘柏峰
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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